Portable tool-driver.



PATENTED JULY 30, 1907.

W. P. KIDDER. PORTABLE TOOL DRIVER.

APPLIOATION FILED APE-4. 1903.

Z SHEETS-SHEET 1.

No'."861',369. RATRNTRDJURR 30,1907. w. P. KIDD R. PORTABLE TOOL DRIVER.

APPLICATION FILED APRA. 19.03.

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I UNITED STATES PATENT cr mes.

WELLINGTON PARKER KIDDER,IOF BOSTON, MASSACHUSETTS, ASSIGNOR To FRANK n.

' GOODYEAR AND GEORGE E. MATTHEWS, TRUSTEES, OF BUFFALO, NEW YORK.

PORTABLE TOOL-DRIVER.

Patented July 30, 1907.

Application filed April 4, 1903. Serial No. 161,086-

To all whom it may. concern:

' Be it known that I, WELLINGTON PARKER KIDDER, a citizen of the United States, residing at Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Portable Tool-Drivers, of which the following is a specification, reference being had therein to the accompanying drawing.

This invention relates to portable tool actuating means, and particularly to those'driven by power.

One of the objects thereof is to provide a simple and inexpensive piece of mechanism whereby tools may be efliciently driven.

Another object is to provide a device of the above type which shall be so compact and light as readily to be carried from place to place.

Another object is to provide a device of the above type in which the movement is so balanced and cushioned as quietly and efiiciently to perform its work without discomfort to the user.

Other objects will be in part obvious and in part pointed out hereinafter.

The invention accordingly consists in-the features of construction, combinations of elements and arrange- 2 5 ment of parts which are exemplified in the device herein described and the scope of the application of which will be indicated in the following claims.

In the accompanying drawings, wherein is shown one of various possible embodiments of my invention, Figure 1 is a side elevation showing a hammer connected in operative position. Fig. 2 is a horizontal sectional view of the same taken on line 2, 2 of Fig. 1. .Fig. 3 is a detail section of the hammer.

Similar reference characters refer to similar parts 3 5 throughout the several views.

It may first be noted that in devices of the type of that herein described compactness is essential, as it is necessary that the same be held manually in an operative position, and it is also requisite that considerable power be developed. It is necessary, too, in view of theabove considerations, that the device be comparatively light and yet be sufficiently rigid to withstand the severe stresses to which the parts of the same are subjected. Moreover, it is highly desirable that the movement be so balanced and cushioned as to permit as little jar and vibration to pass through the handles to the hands of the user as is practicable. The aboveresults are attained in devices of the nature of that herein or pins 7, as shown in Fig. 2 of the drawings. Between one ofthese cranks 6 and the adjacent bearing 3 is fixed an eccentric 8 by means of pin 9 so as to turn with the shaft 4, and mounted thereon is an eccentric strap 10 pivotally connected at 10 to a valve spindle 11. This valve rod passes through stufiing box 12 in one end of a valve chest 13 and is adjustably secured to a D valve 14 'in the well-known manner. The latter is reciprocated by means of shaft 4 with reference to the steam ,ports 15 and 16 and exhaust port 17, formed in the .walls of cylinder 18 so as to actuate the piston 19- in a manner which will be familiar to those skilled in the art. Secured to piston 19 is a piston rod 20 which passes through the stufling box 21 and a guide formed in the frame 22 which is in the nature of an extension of the cylinder 18 mounted upon frame. 1 Secured to the frame member 22 ata point adjacent that at which the piston rod 20 passes therethrough is a perforated guidebar 23 through which also the piston rod passes.

Pivotally connected with cranks 6 are connecting rods25 pivoted at the forward end upon a crosshead 26 secured at,26 to piston rod 20 and heldiin position upon the ends of crank 6v by means of crank,.pins 27.

Piston rod 20 carries upon'itsforward-end aatool carrier 28 whichmay be of any desired form'but preferably is of the form shown and may have secured thereto any desired form of tool, as, for example, a saw, chisel or hammer. The latter is shown in connection with the driver represented in Figs. 1 and 2, and the carrier is shown. as having a casing within which the piston rod 20 is adapted to reciprocate and to which itisadapted to transmit motion by exerting pressure through suitable springs either upon the rearwalls of'the casing or upon the hammer head which. is tapped into-the same. The tool holder is preferably guided in its reciprocating motion by means of guide rod'29. secured thereto and passing through a projection 30 upon the bar 23.

If desired, any other form of tool may be driven by the apparatus hereinsetforth.

Handle 31 is rigidly connected with frame I, preferably by means of a curved rod so as to cushion the same, and is so positioned as to be directly in the rear of balance wheel 5 and piston rod20-and thus takes up chestthrough the pipe '33"coi1t'ro1led'by throttle cock 34, and thence through elbow 36 and the, nozzle 37 to the valve chest, whence it is admitted to thecylinder in a well-known manner by means of valve 14.

Anoil cup is preferably provided, and the weight of certain parts of the engine may be balanced by means of weight 39 secured to the inner surface of fly wheel 5.

The operation of the above described embodiment of my invention is as follows:Having' secured the desired tool to the piston rod 20, the same is held in a proper position with reference to the work by means of handle 32, and the handle 31 is firmly gripped, or,

if desired, held against the breast of-tlie user so as totake up the shock occasioned by the working of the tool. With the parts in this condition the throttle cock 34, which may be controlled by the fingers of the hand which is upon handle 32, is opened and the piston rod caused to reciprocate in accordance with the well-known' principles of steam engineering. When it is desired to stop the engine the throttle cock may obviously be closed without removal of the hand from either of the handles, and thus the driver is con-- trolled throughoutitsentire working by one person without inconvenience or outside help.

It will thus be seen that I have provided a simple and efiicient tool driver in which the movements of the reciprocating parts are so cushioned as to transmit a slight vibration only to the user. Moreover, the handles are so positioned with reference to theworking parts as to take up the reactive shock without discomfort to the operator or severe wrenching stresses upon the several parts of the machine. The provision whereby the several parts are made substantially. symmetrical with reference to the plane of the fly wheel tends further to avoid stresses of the above nature, and also removes any tendency to cramping of the piston or cutting of the guides thereof. The position of the balancing means or fly wheel at one side 'of the cylinder, whereas the tool holding means is upon the opposite side, results in a construction of marked compactness and which is exceedingly 'convenient in use.

It will also be noted that the several parts are simple and the entire device inexpensive.

As many changes could be made in the above construction and many apparently widely different embodiments of my invention could be made without departing from the scope thereof, I intend that all matter contained in the above description or shown in the accompanying drawings shall be interpreted as illustrative and not in a limiting sense.

I desire it also to be understood that the language 7 used in the following claims is intended to cover all of the generic and specific features of the invention herein described and all statements of the scope of the invention, which, as a matter of language, might be said to fall therebetween.

causes 3. In combination, tool holding means, a balance wheel, and means interposed between the above and controlled by the momentum of said balance wheel adapted to actuate said to l holdingmeans.

4. In combination, a frame, balancing means mounted at one end of said frame, actuating means mounted upon said frame adjacent said balancing means, and 15601 holding means adapted to be driven by said actuating means and positioned on the side thereof remote from said balancing means.

5. In combination, a frame, a balance wheel mounted at one end thereof, tool holding means mounted adjacent an extension upon said frame at the other end thereof, and

actuating means mountedupon said frame between said balance wheel and tool holding means adapted to actuate said tool holding means and controlled by the momentum of said balance wheel.

6. In combination, tool holding means, a balance wheel,

substantially alined in position with said actuating and therein, tool holding means mounted adjacent an extension upon said frame, means mounted upon said frame between said balance wheel and said tool holding means adapted to actuate the latter and be controlled by the former, and handles secured respectivelyto said frame and to said extension, one of which is positioned adjacent said tool holding means and the other of which is substantially alined with said tool holding and said actuating means.

- 9. In combination, a frame, hearings in said frame, a balance wheel fixed upon a shaft journaled in said bearings, said balance wheel being positioned between said bearings, cranks upon said shaft, tool holding means mounted adjacent an extension secured to said frame, a cylinder interposed between said tool holding means and said balance wheel, a piston within said cylinder adapted to actuate said tool holding means, and connecting rods fixed to the rod of said piston and connected to the cranks upon said shaft upon either side of said balance wheel.

10. In combination, a frame, a balance wheel mounted between two hearings in said frame, tool holding means mounted adjacent an extension upon said frame, a cylinder mounted-upon said frame adjacent said balance wheel, a piston in said cylinder adapted to actuate said tool holding means, a cross head fixed to the rod of said piston, c0nnecting rods extending from said cross headand connected with cranks fixed to the shaft of said balance wheel at either side thereof, a handle positioned adjacent said tool holding means, 'and a handle secured to said frame and positioned substantially in alinement with the rod of said piston.

11. In combination, a frame, a reciprocating member, means mounted upon said frame adapted to actuate said reciprocating member,'a casing within which said reciproeating member extends, an enlarged head upon said reciprocating member within said casing, a hammer head tapped into said casingupon the side thereof remote from said actuating means, a spring interposed between said enlarged head and said hammer head, a spring interposed between said enlarged head and the wall of said casing, a

guide rodsecured to said casing and adapted to reciprocate in an opening within an extension secured to said frame,

and handles whereby said frame is retained'in position.

12. In combination, a frame, a balance wheel mounted thereon, a cylinder mounted on said frame, a piston within said cylinder the rod of which is balanced by means of said balance wheel, a tool adapted to be reciprocated by said piston, the relative movement of said piston and said tool being cushioned by means of springs interposed between thesame, a handle mounted adjacent said tool, and a 13. In combination, a frame, a balance wheel mounted thereon, tool holding means, means controlled by said balance wheel adapted to actuate said tool holding means, and a handle secured to said frame, said handle, balance wheel tool holding means and actuating means being substantially in alinement.

14. In combination, balancing means, tool holding means, and actuating means connected directly to said tool holding means and controlled by said balance wheel, said balance wheel, actuating means and tool holding means being substantially in alinement. 4

15. In combination, tool holding means, a reciprocating member adapted to actuate said tool holding means, balancing means controlling said reciprocating member, and a handle, said handle, balancing means, actuating means and tool holding means being substantially in alinement.

16. In combination, tool holding means, balancing means, and means interposed between the above and controlled by said balancing means adapted to actuate said tool holding means, said several means being positioned substantially in alinement.

17. In combination, tool holding means, a balance wheel, and means interposed between the above and controlled by the momentum of said balance wheel adapted to actuate said tool holding means, said tool holding means, balance wheel and actuating means being positioned substantially in alinement.

18. In combination, aframe, a balancing means mounted at one end of said frame, actuating means mounted upon said trame adjacent said balancing means, and tool holding means adapted to be driven by said actuating means and positlonedon the side thereof remote from said balancing means, said severalmeans being positioned substantially in alinement.

In testimony whereof I aflix my signature in presence of two witnesses.

WELLINGTON PARKER KIDDE-R.

Witnesses:

E. A. ALLEN, M. E. COVENEY. 

